MPLS Topology 1.0

I’m writing my MPLs exam soon and so I wanted to create lots of labs which run over an MPLS core. I was going to using my original ‘mad’ topology but it’s going to be a hassle to have to create the core each. I’ve instead decided to create a separate MPLS core that contains everything I’ll need.

There are 4 core routers, and 2 access routers. Customer routers are connected to the access routers. There is also a gateway router running BGP with ISP2 that will be for BGP and internet access testing. Note that although there is currently a BGP session between ISP2 and GR1, there are no other sessions yet.

The topology is designed so that when you start running it in dynamips, the core is already set up. i.e. MPLS and OSPF are already running. This is because it’s very easy to configure an MPLS core and 90% of your MPLS configuration work will be done on the access routers themselves. The core routers are just switching packets, that’s it.